NY's tint laws, from what i remember, are simple. nothing on the front windows unless it's factory. i'm not sure what they claim for the backs, but i'm sure it's not too far from that.
as for the exhaust, anything that isn't specified as DOT-legal (usually meaning ANY aftermarket, non-OEM types) is illegal. it might not even be a decibel issue so much as a EPA/DMV mandate.
another issue to look into is primary vs. secondary offense. some states don't list tinting or aftermarket equipment as primary offenses, which means they can't pull you over for just those. now if they ticketed you secondarily to something tha they really DID get you for, that's different. i.e. in DE they can't get me for windows alone, but if they get me for speeding they can tack on the windows if they wish.